Turning-tool.



J. HARTNBSS.

TURNING TOOL.

APPLICATION FILED SEPT. so, 1911.

Patented Mar. 18, 1913.

3 SHEETS-SHEET 1.

COLUMBIA PLANOGRAPH C0.. wAsH1NuTo.-.u.c,

J. HARTNESS.

TURNING TOOL` APPLIGATIION FILED SEPT. 30, 1911, 1,056,097. PatentedMar.18,1913.

3 SHEETS-SHEBT 2.

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COLUMBIA PLANOGRAPH co,.w.\SH1Nm'oN, n c

J. HARTNESS.

TURNING TOOL.

APPLICATION FILED SEPT. so, 1911.

Patented Mar. 18, 1913.

SSHBETS-SHEET 3. k

//Z 27611, for' W CoLuMBlA PLANDGRAPM Co., WASHINGTON. D. c.

JAMES HARTNESS, OF SPRINGFIELD, VERMONT.

TURNING-TOOL.

Speeieation of Letters Patent.

Application filed September 30, 1911.

Patented Mar. 18,1913.

Serial No. 652,046.

To all fic/wm ir may concern Be it known that l, .lanas HAR'rNEss, acitizen ot the United States, and resident ot' Springlield, in thecounty ot lVindsor and Ill-tate ot Termont, have invented certain newand usetul improvements in riurning- Tools. or" which the following is aspecification.

'lhis invention has relation to turning tools which may be placed uponthe tool slide ot an engine or turret lathe for reducing the diameter otthe work.

'(.ne ot the objects of the invention is to so construct a tool that thecutter will be held ir. its cutting' relation to the work with thegreatest rigidity and without danger of the cutter springing backwardfrom the work.

[another object ot the invention is to provide for the withdrawal of thecutter or the rests or both from the work when the cut is completed. sothat the tool may recede with the tool slide with the operative partsdisengaged trom the work.

Still another object ot the invention is to secure a quick resetting otthe tool to p0- tential working position, and to this end to provide aseries ot selective stops by means ot which the tool and the rests maybe setl at predetermined posit-ions without loss ot time on the part ot'the operator.

A. fourth object ot the invention is to so construct the tool that afterone cutter has become worn it may beA replaced by another and the latterlocated with facility and wi vh precision with respect to the work andthe rests.

Referring to the drawings: Figure l represents an end elevation ot' atool embodying the invention. Fig. 2 (Sheet 2) represents a plan view ofthe same. Fig. 3 represents an elevation of the other end of the tool.Fig. i represents a horizontal section through the tool and shows thecritter' carrier in plan view. Fig. 5 (Sheet l) represents a verticallongitudinal section through the tool and illustrates the cutter andrest carriers in side elevation. Fig. (i (Sheet 3) represents a similarsection just in the rearl ot' the cutter carrier. Fig. 7 represents anend elevation of the cutter carrier and illustrates a portion ot thebody and the eccentric bushing in section. Fig. S represents a sectionon line S-S ot Fig. 6. Fig. 9 represents a partial section through thetool for the purpose of illustrating the end of one ot the rest carriersand the adjacent end ot the critter' carrier. Fig. l0 (Sheet l)represents a section on the line lO-lO of Fig. 5. Fig. ll represents asection with the stop pin withdrawn and stop ring moved away from thepin. Fig. l2 represents a section on the line l2-l2 of Fig. 5. Figs. 13and let represent respectively a spacer and one of the stop rings. Fig.l5 represents the slotted portion of the body in which the levers orlinks are mounted. Fig. 16 represents the sleeve or member which etfectsthe adjustment of the critter carrier.

rlhe same reference characters indicate the sameor similar partswherever they occur.

The tool as l have illustrated it consists of a body upon which arepivotally mounted three carriers, one for the cutter, one for the backrest or diameter-determining rest, and one for the top rest whichengages the work between the cutter and the back rest so as topreventits moving laterally under the stress orn the cut. rFliesecarriers are all moved simultaneonsly and to the saine eX- tent into andout ot engagemnt with the work. although the cutter carrier and the tworestv carriers may be adjusted independently of each other when occasiondemands. The positions of the cutter and the rests are determined by aselective stop mechanisni, so that the instrumentalities referred to maybe set in any one of a series et predetermined positions by moving oneor the other of a series of stops into active position, the selectivestop mechanism being so constructed and arranged that the movement ot'any one of the stops into active position causes the movement of theremainder of the stops to inactive position.

Proceeding to a more detailed description ot' the particular embodimentof the invention 'which l have illustrated: the tool comprises a body 2Owhich is laterally extended at its base so that it may be firmly boltedor otherwise secured to the tool slide of a lathe. The work carrier 21consists of a block having in one side a groove or recess 22 for thereception of a cutter 23. The carrier is formed with a pivot stud 24which is journaled in an eccentric bushing 25 located in a cylindricalaperture in the body 20. A collar 2G is keyed on the stud 24, andbearing against the collar is a nut 9.7 screwed on the threaded end 28of said stud, so that by tightening the nut one face of the carrier maybe drawn with suliicient pressure against the adjacent fiat face of thebody.

The inisiiiuey ina)Y be rotati\'ei v adjusted and is eiaiiiped iupoSition iin' a screw pin Qi) (dotted linee in Fie. 5) inning its endabutting' against a wedge iiioei; 2U bearing againstthe bushing. Theinieiiiinf, v iS Set with `its: niajor aXiS leuiistaiitiaiiy Yeitieai,So that by Siigiitiy rotating` it in one direction or the other thecutter carrier may he adjusted iiodiijY Suhsiantiaiiy ionggitudinaiiy orendwise oiE the euttei. The cutter earriei' its extended iieyond theeutting end oi the cutter and is torni 1d witi a Sectorahaped 'ai-iiiIE() havingl worin teeth eut therein. i shaii euiiseetpieutiy deserihehow Vhe eut-ter is secured to the cutter hioek and io fated withprecision with reterenee to the work and to the rents. -i (Figa. 5 and(i) indie: tie-5 another earier upon whieh there. inounted a haci; erdiauieter-determining reet @the lari-ier i5 pii'oted to the hody iiy aheaded pivot .stud 33 passed into an aperture in the body and having` aneccentrie portion near its head on whieii the earrier iteeit ispi'voted. fi eerew pin fifi passed iiii'o the end ot the hody engagesthe pivot sind to hf id it in auf.' poeition to which it niay headjusted. iii' the enipioynieiit of the eeeeutrie pivot stud ani enahiedto adjust the reet arrier ieu; .wi.-e. 'i'he two studs ii ano appr twocarrieres direction y Y the Carrier f", i tor-r aped. at B5. and ieprovid-ed with ifiie seeoiwiiziped ende; of the oyeriap. as iiiwii inFigi'. 5. eeiissiote: ot a roiier jouriiaied and heid 'n uiaee if' athreaded Sei-ew 37.

oit the stud .-ii on wiiieii the iied is eeeenirie with respect to diesind, so that when the wtud in it` soeiiet in the "B areffiiiietantiali) paraiiei and are ther. so that tiie :"tiaiiy the saineits tree end as indicated worin teeth. two carriers The r it upon a stud3G a rrier the lt this rotative adjuetnient of ide aerew piu@ *Q m(dotein; 5 and ifig'. t3) passed into tetti iine in the under sine oi'the earrier 3l and eiignigA inn` Siiouideixi toruied on the stud. i

rihe Carrier :tor the Ytop rest is indicated at di). and it eonsists etan arui journaied ou a headed pivot eind 4i-l which is passed throughthe body ot' the farrier and heid in `iliiaee by a nut ft2, as Shown iniige. G and S. The pivot Stud il is `io fated near the top oit the bodyand the carrier is pendent there- Vtroni So aS to iie at` an angie tothe Carrier 3i. ii ar its iower end it is provided with a pivot Stud i3on the projecting' end ot whieh the top rest is journaied, the hitterbeing heid in piace hy a headed Screw 45. The arriu ii0 is formed with aCurved eain portion 4to which is engaeed with a ,finger i? projectingiateraiiy `troni the Seet )i'Siiape ii end oit the earrier 'iiiecurvature of .f. remue the Cain is such that when the carrier 3l ianioved upward the iiiiejer -iT wiii ride along its eain and swingr thecarrier i0 to the right toward the work to pieeiseij7 the saine extentthat the Currier 3l is niored. riiuay when the imei; reet Carrieradjusted hy nieeiianisin which i wiii suhsequeiitiy ete piain7 the toprest is adjusted Siinuitaneoueiy with it. For the purpose et preeervingthe engagementy of the Cani atti with the tingjer ai?, a Spring` i8(dotted iines in Figi'. t3) ioeated in a soeiet iii the iiody Q0 beaagainst a pin 4t2) ioeated in said Socket and projecting` into anapertiiire in the iiody. and Said pin 4) in turn hears against a pin 5iprojecting` iate aiiy troni 'the carrier -eiO into the said aperture 50.iiie other end of the Spring` bears against a pin 414) abutting againsta iaterai pin 49"? projecting frein the Cutter Carrier. rihe huh orpivoted end of the, Carrier 4:0 has an index or peint which nieves aionga graduated Seaie piate 5? aiiixed to the 'top of the body so that theoperator iiiay roughiy deteru'iiiie the ioeatioii of the two reet?. andthe cutter when the iatter is moved with iiieni.

For the purpose oit siniuitaneoiniiy or iudependentiy nioiingthe cutterCarrier and the rest carriers7 i enipioy two woruie which are indu-atedrespeetiveiy at` .Hr-i. The worin 5i i'ornied ou or Secured to the endoit a Sii-att 5G which is ineiined oiiiiqueiy downward troni the top oitthe iiody, as Shown `in Figs. l and o taken iii conjunction. rihe worin5i engages the worin. teeth on the haeierest earrier 3i, that byrotatingY the Shafty the earrier wiii he moved about its; pivot. The,worin 555 iS iioinied on a, Sleeve .5T io'fa'ed upon the Shatt, the endoit the worni aiiuttinl afgaiiiet a siiouider in the body iiy which itYis heid against downward nioi'enient. rif he worin engages the worinteeth ou the Sector-shaped end SiO ot thev cutter carrier 2l. '.iiheshaft 56 projects aiioi'e the top ot' the body '20 and is provided witha. reduced threaded end 5S on which a tapered eeiiar 5S) Sei'ewed ao asto engage the end of the Sieei'e 5i' and ioree the worin toward theworin 5i untii the eontroutiug faces ot iioth worine abut againSt theYshouidera GO. (Si. in the body. i-i niiiied dish whose hub hee a taperedbore is Yiioiced on the eoiiar 59 by a thiunii uut (i3 threaded ou theend Ta@ oi the sahaiit 5t. By rotating iiie iniiied diei( the Sieei'emay be rotated iiidependeiitiy oit the shaitt 5t; to eiteet theindepei'ident adjustment ot the rest Carriers. Screwed upon the threadedreduced end of the sieeife 5T iS a diei; Gi paraiiei with that at (S2,and hy rotating said disk (3f-ii the cutter carrier niay iie adjustedindepeiidentiy ot the reet Carriers, in which ease i can adjust the eetScrew 95 to engage the worin :5h-ait, Sti and iioid ii and the 'estcarrier` againet nioveuieni. i"o

Cri

provide, however, for adjusting all the carriers simultaneously the disk6st, which is of greater diameter than the disk GQ, is provided with asocket member in which is movably mounted a pin 6G having a crosslocking pin GT one end ot which is adapted to engage a notch 68 in theperiphery ot the disk (52. spring G9 located in the socket member abutsagainst the shoulder therein and against the shoulder on the pin G6 soas to hold the pin 66 normally upward with the locking pin GT engagedwith the disk 62. rl`he socket member G5 and the pin 66 which has a head'T0 constitute a handle by which the disks may be simultaneously rotatedin one direction or the other. lt will be observed that the two worms 55and 5l and the complemental worin teeth on the two carriers -lO and 3lare oppositely threaded so that when the handle just described is movedin one direction or the other the carriers e() and 3l will be caused toapproach toward or recede from each other. Un the periphery ot the disk(it is micrometer scale, and on the body is a pointer or index fol whichcoierates therewith. By depressing the pin Go the handle may be rotatedto adjust only t-he rest carriers, and while the pin is thus depressedthe disk GQ may be rotated independently ot the disk Get to ettect anindependent adjustment ot' the cutter carrier. After the cut-ter andrest carriers have been adjusted independentlyv of each other to bringthe cutter and the rests into a predetermi ed relation so as to properlyengage work of a certain dialneter, by loosening the wing nut o5 thedisk (Si may be adjusted with reference to the shatt 5G so as to bringits notch (38 in registration with the locking pin (ST, after which thethumb nut will be again tightened to secure the disk (32 in place. Thisadjustment may be desired at times when different cutters are. used.

Ars previously indicated, l employ a selective stop mechanism torquickly locating` the cutter and work rests in any one of a series ot'predetermined positions. This mechanism comprises a series of stop ringsTl, T2, T3 and Tl which are loosely journaled upon the sleeve 5T andseparated by spacer rings T5. The spacer rings are provided withinternal notches or keyways T6 to be engaged by pins TTn projecting`from the sleeve. The

sleeve is termed with a shoulder 78a (see Fig. 1G) and the stop ringsand spacers are clamped against said shoulder by set screws T9 passedthrough the disk 6l. Each ot the stop rings Tl, T-Ll, is provided with aprojecting stop a. extending troni its periphery, one edge ot the stopbeing beveled as shown by Figs. 19 and l-l. By loosening the setscrewsT9 each ot the stop rings may be adj usted rotatively to bring its stopa into any desired position with reference to the others and to thesleeve. For coaction with the stop rings I employ a series ot manuallymovable stop pins TT, T 8, T9, S0, which are located in sockets formedin the body and arranged radially and in the plane of the stop rings Tl, TQ, T8 and 'T4 respectively. These stop pins have reduced endsprojecting through a cover plate Sl atlixed to the body so that they areaccessible to the operator, in consequence of which he may depress anyone of the them to move it into the path of movement ot' the stop o-nthe adjacent stop ring. l provide devices by which the setting of anyone of the pins to active position withdraws the remainder of the pinsto inactive position, and this mechanism consists ot a series ot' leversor links, as shown in Fig. 5. Two levers S2, 83, which are appro-ximtelybow-shaped extend into the slots in the stop pins TT, T8, and T9, 80,respectively. Bearing against these two levers midway between their endsis a similar lever Si mounted in a pivot stud S5. rFliese levers arelocated in a narrow slot SG formed in the body, as shown in Fig. andFigs. l0, 1l and 12. ln general appearance these levers resemble theequalizing doubletrees and whittletrees ot' a wagon, but they are solocated with respect to each other that the movementl ot any one ot thepins, say tor instance S0, to active position swings the various leversabout their tulcra so as to torce the other stop pins to inactiveposition, as will be readily understood by an examination ot rEheprovision et this selective stop mechanism makes it possible tor theoperator to instantly set any one ot the stop pins in active position soas accurately to locate the cutter and the rests in the desiredpositions. rEhe slots in the stop pins are sutliciently long to enablethe operator to manually withdraw the active stop pin to inactiveposition and thereby permit him to impart several rotations to thecarrier-moving members to bring the cutter and rests into approximateposition with respect to the work. l have stated that the stops on therings are beveled on one side, and this is done to permit the operatorto turn the carrier-moving meinbers reverscly to separate the rests andthe cutter from the work without withdrawing the active pin. lnpractice, when the cutter has completed its cut on the work the operatorwill impart to the two disks a partial reverse rotation to separate thecutter and rests sin'mltaneously from the work and permit the tool to beted back trom the work without scratching it; or. it desired. theoperator may oy depressing the pin 66 rotate only the disk (34Creversely to withdraw the cutter trom the work while leaving the restsin engagement therewith.

referring now to the cutter: it is my purpose to provide the tool with aplurality ot straight bar cutters rectangular in cross .section and toniark on ach cutter figures indifating its height or thickness troni itsbottoni tace to its top tac rl`he thickness `oil the cutter isconsiderably less than the groove or socket in which it is lorated, andinstead ot resting upon the bottoni wall ot' the groove l provide torthe cutter being' secured between screws which project into said groovethrough the top and bottoni walls lhereoit. lach cutter bar has at itsextrein'tv a cuttingl edge, which is at an angle te its top and bottonitrices, and constitltes what is connnonly known as an end cutter.

Qttet'erring to Fig. 5, Q0 indicates what nzav .'lor convenience call anabutment :"crew. lt passed dmvnvmrdljT tlnfough the top wall oit thegroove in the arrier l, and its head is provided on its periphery with agraduated scale. @the inner end of Vthe screw is Ytlat` and it isadapted to be engaged by the top ot the cutter 2B approxiinatelj7 at thecuttingl end thereoiz in position to tale the thrust ot the work againstthe cutter. V the position ot' this screw tileterinines the position otthe cutting edge with reference to the wo "k, and it is intended to beadjusted in or out in accordance with the thickness or height oit thecutter s being' indicated by the nuniera' on the cutter. ttl indicateswi icruin screw which is pa lower wall ot the groove in tl C ,5o as toengage the under site Liar at a point tarther than the screw ,Y ieabutment screw 1 deterinined, the screw 91 is Ld- ,v until it engagesthe cutter t'ic top surtace oit the cutter the bottoni ot the screwtit). h that at atl but farther than the screw 90 and the VVed downwardthrough tl e l or the groove and, engaging ot the cutter l the toi o; r,clainps the cutter attainsA the abutment screw 5)() and the ital cruui"-w lll by Slightly tiltingl it aboutI the l Y '.llwo :ulcitional srews93, Qt, which terni clamping` or binding` screws, are passed through thebottoni and top walls ot the grot and are arranged substantiallvv inalinen ent .vith each other so as to tirinlj7 clanpp the cutter barbetween thein. lhese last two screws are depended on tor holding thecutter ,irinlv against lengthwise noveioent, whereas the lirst threescrews which vere described are depended upon for the actairate locationot the utting' edge. The tive screws are set or actuated in the orderdescribed, and it will be noticed that the cutter arrier bears upon itadjacent the several screws the nuinbers l, 2, P), i and 5, to indicateto the ope ator the order in which they should be adjusted.

ros/ener By the devices thus described, l provide a quick resettingtool. rlhat is, when a cutter which h: s beconie dull has been reinovedtroni the holder or carrier and is replaced bufv another, the cha `acterthereon indicating' its thickness enables the ope ator with e; anddespatch to adjust the screw il() so as to exactlyv position the cuttingnose oit the cutter, and place it where the nose ot the previous cutterwas lo ated lt will be apparent to any one skilled in the art to whichthis invention relates, that the tool which have described possessesnuinerous advantages, to all of which it is unnecessary to roter. l may,however. point out that the construction is such that the parts cannotspring' but are held rig'idljT in the positions to which they areadjusted. rthe body ot the tool is a single casting' with an aperturetor the passai`44 oil the work, into which aperture the two rests andthe cutter project. llhe two inain czrriers, that is, the cutter carrieand the back-rest carrier, have their recrpcctive ojrierative nieinherslo- 'ated to cneefre the work subs-ztantiallv inid wav between the endsot said carriers, one

end oit each carr' r being` t V@ruined and the otlY -r eid bein inoved,so that each constixites a lever or tlc seccaid class, in wiih llevtulcruin is at one end, the load in the middle, and the for Ie appliedto the other end. lt will likewise be apparenti to thok e skilled in theart that the invention is capable of a variety of embodiments and thatseine ol' the parts which havi added iter 'etinenient and tor securing'suhstantiallj7 ideal conditions niaj;T ,oe omitted without departing'troni the spirit and scope o'l' the invention.

lil-giving thus explained the nature ot hij' said invention, auddescribed a wajvv ot constructinji` and using` the `anie, although withoutl atteinpting` to set t'orth all thc tornis iu which it inaj be inadeor all the modes of its use what l claiin is:

l. It turning; tool comprising a body, a cutter, a cutter carrierhaving` a segmental rack, a pivot tor pivoting said carrier to saidbody, a rotatable ineinber journaled on the bodv, and a worin on saidnieinber engaged with said racl tor inoving said carrier.

Q. et turning` tool comprisingl a body, a cutter, a cutter carrierhaving' a rack, a rotatable nieuiber jourialed on the body, a worin onsaid ineinber engaged with said 'ack tor inoviug said farrier, andmanuallyope able mechanism comprising a pluralitjv ot stops 'torstopping the rotation ot' the worin in anyv one et a pluri lity ofpredeterinined positions.

il. turning` tool comprising a body, a cutter carrier having a rack onone end, a pivot connecting the other eud ot said carrier to said body,a cutter supported on said :arrier between the ends thereof, a rotatablemember journaled on the body, a Worm on said member engaged with saidrack tor moving said carrier, and a manually-operable stop movable intoand out of active position :tor stopping the rotation of the worm in apredetermined position.

l. A turning tool comprising a body, a cutter, a cutter carrier, arotatable member journaled on said body and operatively connected ivitlisaid carrier for adjusting it, and a series ot stops adapted to beselected for stopping said member in any one ot a series of selectedpositions.

5. A turning tool comprising a body, a cutter, a cutter carrier, arotatable member journaled on said body and operatively connected Withsaid carrier for adjusting it, a series oi stops rotatable with saidmember, and a series of stops on said body adapted to le selected t'orengagement With the firstmentioned stops respectively.

G. A turning tool comprising a body, a cutter, a cutter carrier, arotatable member j ournaled on said body and operatively connected withsaid carrier for adjusting it, a series ot stop-rings adjustably securedon said member, and a series of stop pins on said body adapted to beselected tor engagement with the respective stop-rings.

T. A turning tool comprising a body, a cutter', a cutter' carrier, arotatable member journaled on said body and operatively connected Withsaid carrier for adjusting it, a series of stops rotatable with saidmembers, a series of coacting stop pins on the body, and connectionsbetween said pins and actuated by the movement of any one of them toactive position for moving the remainder to inactive position.

8. A turning tool comprising a body, a cutter, a cutter carrier, arotatable member j ournaled on said body, and operatively connected withsaid carrier for adjusting it, a series ot' stops rotatable with saidmember, a series ot coacting stop pins and equalizing links between saidpins, constructed and arranged vfhereby When one of said pins is movedto active posit-ion it automatically restores the remainder to inactiveposition.

9. A turning tool comprising a body, a

cutter, a cutter carrier, a rotatable member journaled on said body andoperatively connected with said carrier for adjusting it, a Work rest, arest carrier, a rotatable membei journaled on said body and operativelyconnected with said rest carrier for adjusting it, and meansforconnecting said members to rotate in unison and simultaneously toadjust said carriers.

lO. A turning' tool comprising a body, a cutter, a cutter carrier, arest, a rest carrier, said carriers being formed with rack teeth, andWorm mechanism mounted on said body and engaged with said rack teeth foradjusting said carriers simultaneously.

1l. A turning tool comprising a body, a cutter, a cutter carrier, arest, a rest carrier, av rotatable member' operatively engaged with oneof said carriers to adjust it, a rotatable member operatively engagedwith the other ot' said carriers to adjust it, said members beingindependently rotatable, and means for coupling said members to rotatein unison.

1Q. A turning tool comprising a body, a

Work rest, a Work-restcarrier having a rack rack for moving saidcarrier, and manually operable mechanism adapted to be selected forstopping the rotation of the Worm in any one of a plurality ofpredetermined positions.

let. A turning tool comprising a body, a Work rest, a work-rest carrierhaving a rack, a rotatable member jouinaled on the body, a Worm on saidmember engaged with said rack for moving said carrier, and a manuallyoperable stop for stopping the rotation oit the Worm in a predeterminedposition.

l5. A turning tool comprising a body,v a Work rest, a Work-rest carrier,a rotatable member journaled on said body and operatively connectedivith said carrier for adjusting it, and a series of stops adapted to beselected for stopping said member in any one ot a series of selectedpositions.

16. A turning tool comprising a body, a Work rest, a Work-rest carrier,a rotatable member journaled on said body and operatively connected Withsaid carrier for adjusting it, a series of stops rotatable with saidmember, and a series ot stops on said body adapted to be selected forengagement with the Hist-mentioned stops respectively.

17. A turning tool comprising` a body, a cutter, a cutter carrier, arest, a rest car "ier, a rotatable member operatively engaged with oneof said carriers to, adjust it, a rotatable member operatively engagedWith the other ot said carriers to adjust it, said members beingindependently rotatable, a disk connected to each of said members, andmeans tor connecting said disks together.

1S. A turning tool comprising a body. a critter', a cutter carrier, arest, a rest carrier, a rotatable member operatively engaged with one otsaid carriers to adjust it, a rotatable member operatively engaged withthe other ot said carriers to adjust it, said members beingindependently rotatable, a disk connected to each member to rotate it,and a movable pin carried by one disk and adapted to engage the otherdisk to connect them together.

l). It turning tool comprising a body, a cutter, a work rest, a sectortoothed cutter carrier, a sector toothed rest carrier, pivots connectingsaid carriers to said body, oppositely threaded worms supported by saidbody and engaged with said arriers re spectively, and means for rotatingsaid worms.

,it turning tool comprising a body, a cutter, a work rest, a sectortoothed cutter carrier, a sector toothed rest carrier, pivots connectingsaid carriers to said body, oppesitely threaded worms supported by saidbody and engaged with said carriers respectively, and a rotatable memberconnected to each worm to rotate it independently of the other.

2l. A turning tool comprising a body, a cutter, a work rest, a sectortoothed cutter carrier, a sector toothed rest carrier, pivots connectingsaid carriers to said body, oppositely threaded worms supported by saidbody and engaged with said carriers respectively, a rotatable memberconnected to each worm to rotate it independently of the other, andmeans for connecting said members to rotate in unison.

turning tool. comprising a body, a cutter, a work rest, a sector toothedcutter carrier, a sector toothed rest carrier, pivots connecting saidcarriers to said body, oppositely threaded worms supported by said bodyand engaged with said carriers respectively, rotatable means forrotating said worms in unison, and selective stop mechanism for stoppingsaid means and worms at any one of a plurality of predetermined pointsin their rotation.

Q3. A turning tool comprising a body, a cutter, a cutter carrier, a backrest, a backrest carrier, a top rest, a top-rest carrier, pivotsconnecting said carriers to said body, and means for simultaneouslyadjusting said carriers to the same extent.

2st. A turning tool comprising a body, a cutter, a top rest, a carriertherefor, a back rest, a carrier therefor, pivots connecting saidcarriers to said body, one of said carriers having a curved portion andthe other engaging said curved portion, whereby the movement of thelatter is imparted to the former, and .means for moving thesecondmentioned carrier.

it turning tool comprising a body, a carrier having a socket or recess,a cutter located in said recess, a position-determining abutn'ient screwfor engaging the top of the cutter, an oppositely arranged fulcrum screwfor engaging the bottom of said cutter and farther from the cuttingedge, and a clamping screw for engaging the top of the cutter and stillfarther from the cutting edge, said screws being threaded into saidcarrier and entering said socket or recess.

26. turning tool comprising a. body, a carrier having a socket orrecess, a cutter located in said recess, a position-determininglabutment screw for engaging the top of the cutter, an oppositelyarranged fulcrum screw for engaging the bottom of said cutter andfarther from the cutting edge, a clamping screw tor engaging the top ofthe cutter and still farther from the cutting edge, said screws beingthreaded into said carrier and entering said socket or recess, andoppositely arranged clamping screws with confronting ends for engagingthe top and bottom of said cutter at points more remote from its cuttingedge, all of said screws beingl threaded into said carrier and enteringsaid socket or recess, substantially as set forth.

Q7. A quick resetting turning tool coinprising an end cutter consistingof a bar having a cutting edge at its end, a holder for said cutterhaving an adjustable abutment to engage the end of the cutter ad jacentthe cutting edge opposite the cutting point, and determine the positionof said point, and clamping means for holding said cutter against saidabutment wh-ereby the cutting edge is positioned.

QS. it. quick resetting turning tool comprising a cutter consisting of abar having a cutting edge at its end terminating in a cutting point, andhaving a character thereon indicating the thickness of the cutting endof the cutter, and a holder having an adjustable abutment bearingcharacters to indicatie the position of said abutment, said abutmentbeing located on said holder to engage the cutting end of the cutter baropposite the cutting point, and means for clamping said cutter againstsaid abutment.

29. A turning tool comprising a cutter consisting' of a bar having atits end a cutting edge terminating in a cutting point, a holder havingan abutment to engage the cutter at its end adjacent the cutting edge,adjustable means for holding said cutter against said abutment andoppositely arranged adjustable means on said holder for engaging saidcutter and clamping it to said holder.

30. A quick resetting' turning tool comprising a body, a cutter carriermovably mounted on said body to carry the cutter toward and from thework, an end cutter consisting of a bar having a cutting edge at oneend, an adjustable diameter-tieten mining abutment on said carrierengaging one of the longitudinal faces of the cutter bar at the cuttingend of the said cutter bar to resist the lateral thrust of the cutter,and means for clamping said cutter bar agztinst said abutment.

3l. 1li quick resetting turning tool comprising e nga ge a cutterholder, clamps thereon to and clamp the cutter, a cutter bar having acutting edge at its extremity and having its. cutting end projectingbeyond said clamps, and an abutment on said holder engaging theprojecting end of said cutter and resisting the lateral thrust againstsaid cutter.

A quick resetting turning tool comprising a` cutter consisting of a barhaving top and bottom longitudinal faces and having a transversecutting' edge at its end, a cutter holder having a recess for the cutterof greater Width than the height of the eutter bar, an abutmentprojecting into said recess, and engaging one of said faces of saidcutter opposite the point of engagement of the cutting edge with theWork to resist the lateral thrust against the end of the cutter and todetermine the diameter of the Work, and clamping devices projecting intosaid recess and engaging the top and bottom faces ot said cutter toclamp it against said abutment and to hold it against longitudinalmovement.

A quick resetting turning tool comprising a cutter holder, clampsthereon for engaging a cutter, a cutter bar having a symbol thereonindicating its diameter, an adjustable abutment for engaging the end ofthe cutter behind the nose thereof, and a scale to indicate the positionot the adjustable abutment and thereby to enable the operator to adjustthe abutment to correspond with the diameter of 'th-e cutter.

n testimony Wh-ereotl l have aiicrxed my signature, in presence of twoWitnesses.

JAME S HARTNE SS.

TNitrit-isses J. W. BENNETT, J. W. ALKER.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

